Grooving device for operating on shoes



Aug. zo, 1935. w1.. WILSON 2,011,668

GROOVING DEVICE FOR OPERATING ON SHOES Filed Dec. l5, 1932 Fig. L K1 M111 )11m "111 Patented'Aug. 20, 1935 PATE-NT j OFFICE 2,011,668 l GRoovrNG DEVICE" Fort OPERATING y"oN "SHOES Waiter L. Wilson, Y Natick, Mass., assignr to United Shoe Mach'ineryiCorporation, Patersom' N. J., a corporation of New Jersey Application December .15, 1932, Serial No. 647,425 l 13 claims. (01.12-83.51)

f'lhis'invention relates to cutter-heads used in the manufacture of 'shoes and is herein illustrated as embodiedin a device designed to cut a groove inthe shank-portion of a lasted shoe for the reception of a shank-stiffener.

Y In thermanufacture'of womens shoes it is usual togreinforce the shank-portions with metallic stili-feners'. The stiffeners most commonly used for this purpose are strips of sheet steel, suitably m curved and molded in cross-section` In the nlishetl vshoes thesev stiffeners lie between the in soles and the outsoles, and because of their thicknessitisnecessary toprovide space between the lasted' margins of the upper material, to the end k' that'they willnot project beyondlthe general plane; of suchmaterial,v since if they did pro-ject -itivonld be exceedingly diicult, if not impossible, toi'naintain the shank-portions of the o'utsoles in'jco'ntact with these margins. l Y In "preparingthe uppers of shoes it is customary toprovidesurplu'smaterial bylwhich the lower l margins thereof `may be `pulled over and lasted. In shoes ofcertain types, not including welts, the lastedmargins do not stand up from the in- Soles but lie `against theinsole, that is,4in confronting relationtheretd Consequently, in such aj shoey the lasted margins lie so closely toeach other inthe shank-portion, particularly if the shank i'snarrow; that there is not suicient space between themto -receive a shank-stiffener, and after the shoe has` been thus lasted it 4is necessary tocutjaway one or both, usually both, lasted margins to provide Va groove or channel as wide as theshankfstiiener to be used. For this operation it'isthefpractice ofsome manufacturers totA score the margins with a hand-knife,'but to d so requires `considerable care to locate the scor- 'ingcuts far enough apart and atthe same time to:` avoid cutting away sof much 4of the margins 40 4as to weaken the connection between them and the insoles. Moreover, when cutting away the margins by handthe operatorhas no means by `which to guide the scoring knife in straight lines and nthingto guard against cutting too deeply 45 Ainto the insole.V This method of procedure is 'particularly dicult when practiced on cement- Vlasted shoes,` since the scoring knife is obliged to score margins' that have been coated and impreghated with pyroiiylin cement. The problem, so 59 Afar as it relates to cement-lasted shoes, is further `aggravatedloy the diiculty of removing the narrowstrips that' have been severed by a sco-ring knife, since these strips remain stuck to the insole by the pyroxylin cement after the scoring cuts 55 :have been made.

are madeinthe form of relatively thick cireular f action,

`In view'of the conditions above set forth,`-`an object of the present invention is to provide improved means for cutting grooves in the Shanks of lasted shoesfor the reception'of shar'ik-stiffenL ers. I5

As herein illustrated, the inventionisembodied in Vanrimprove'd grooving device comprising a pair of thin-edged scoring members spacedap'art to score respectively the opposite margins of'uppe'r material that lie on the shank of the insole of m a lasted shoe, a router arranged` between the scoring members to take out "the lsurplus upper material that lies between them, and rotary driven means 'by whichthe scoring members andthe router are clamped and carried in rotationall unity'. u Preferablythese elements ofthe grooving device are' supplementedby, and arranged betweenl,`a pair of `cooperative depth-gages arranged torun on'the scored margins of the upper material adjacent to the scoring cuts and thereby limitth'e depth 'of these "cuts so thatif the scoring meinbers penetrate the insole at'all the magnitude of such penetration Will be negligible.L As v lnarein illustrated, the scoring members are hardened steel disksthat resemble the appearance of loircular saws, but their peripheral teethjwhich are f fine and closely related, are not set: Moreover,

lthese disks are preferably notmuch thickerthan commonpaper, since theiriduty is not to remve l stock but merely to make scoring cuts therein. Because'of their extreme thinness they are exible, but another feature of `the invention'provides'ifor reinforcingthem against fiexure.

In 'accordance with the feature last mentioned, thedepth'gages of the illustrated cutter-head 35 disks and are arranged against the outerffaces o-f the scoring disks so "that they may cooperate with the interposed spacer not only bracethe "scoring disks but also to clampthem.

Although, as. hereinbefore stated, the scoring 40 disks resemble circular saws in appearance they are preferably arranged or rotated to operate not as saws but to score thework without tearing the substance thereof. Accordingly, the teeth ofthe 5 scoring disks are pitched backwardlyfso'that their inclined" edges rather than their; abrupt edges will do the' scoring'. One advantage of Athis mannerof execution is that the scoring teeth, ,instead of tending to pull the upper materials away from the insole will press them against the insole. Another advantage is that they will lform cleaner cuts by reason of avoiding all tearin 1n. accord` ice with still another feature `of the y invention, the spacer interposed betweenr the t scoring members is preferably provided lwith, a

small number of coarse teeth, spaced far apart, that project beyond the depth-gages toA rout the surplus materials severed by the scoring members, to the endthat the space between the two scoringcuts willbc"cleared'of surplus stock as Athe scoring. progressesg,... l'These coarse teethv that do the, routing are preferably provided with sharp edges that extend across the gap between the` scoring members-the better vto rout surplus,,ina-V terials that have been stuckto the insolewith `A cement.

Other features of the inventonvare illustrated in the drawing and are hereinafterfdescribed and claimed.'` y

Referring to thedrawing,

Fig. 1 is a Vertical sectionofa groovingdevice embodying the present invention and is herein :,f

Jrepresentecl as mounted on a rotary driven shaft;

'cflu`de`s4 a sectional" 1view* of faf cement-lasted' shoe infpi'ces's'of'bein'g'grooved thereby;

l Fig.' A3 is a bottomplan View .of a's typical cey Ilasted' shoe, 'the shank-portion of which reduiresfto be grooved for the reception of alshank- Fig. 4 is a; bottom pl n View or afslank-sting ener orwell-.known .typefsuitable for, attachment to a shoe of .the type illustrated in the other figures, r-

, Fig'. 5 isracrosssectionalviwon,a larger scale r n.andiientineui.n viduauy, 4theyiare hereinafter fl thfeMshank-portin of the shoe approximately ne' pcintlindicatedbyiineVeV of Fig. 3, the fl 'also.includingl a portion V.offthe Lgrooving vabout tov start am grooving' operation; Aand g Ela/1Q? Fig. Ak6A isa cross-sectional' viewsimilarto Fig.

f swjbdt representing 1 the shoe] as' havinggimenl e anfdfprovidedwithf a shankstiffener of 'represente'din Fig. 4f4

I0 aflining H'vofsoft leather rsuchy as bien; @heel-Seat piede wf om# sed vliber, land heel-seatf 'tacks' "l 5. The last ingtlie shank. ThsitaCKs ar "Subsdtly fp Vneu out afterrthe cement, lig' has hardened or;

fet sufficiently to form `a permanentconnectin ffro'rrmffd rby such.: tacksi'being indicated at" T8 in f FigI 3Q The heelsea't ,tackfs k,l 5, however, remain kthe shoe, ltheir'points being 'turnedba'ck and "clenched by a'rnetal plate I9 with kwhich thehe'el- "part ofthe last is'shod." Y lfIt `is'to be observedin` Figs. Sfand `vgthatjtlie fo erdrawnjand v'lastedmargins fof"l upper material in thefrsliank-portion lievery close 'tof each other.

ln'manygoases one or moreiofthe layers ofy which ther-upper :material vis composed rmay' actually touch the ropposite margin, rand vcommonlyfthe f narrowi-sp'ace'fbetweentlie' 'confrntingydges of ne .iasteji ljsho'e illustrated 'herein @ecm-prises.

an interlining ordo'ubl'efr I2 ,Offwovenr cement indicated hy heavyliriesfl Tf'inFig's and between "the, upper andtheinsue, 'the pu'netures,

these marginsis partially, ifnot entirely, filled with surplus cement as represented at 20 in Fig. 5.

To form asuitable channel in the shank-portion ofthe shoe for the reception of a shankstiITener, such as that represented at 2| in Figs.

4 and 6, the present invention provides an improved cutter-'head that includes a pair of cutters for scoringV the overdrawn and ylasted margins of upper material along lines suitably spaced one from the other as represented by the broken lines 22 in Fig. 3. Thecutter-head also includes `a router for clearingA out the surplus materials between the scoring cuts. the cutter-head `is illustrated in Figs. 1, 2 and 5.

The construction of Figjl includes a rotarydriven shaft 25 of a typev common'in edge-trimming machines, the shaft being mounted in stationary bearings, one of which is indicated `at 26. A detail of common portion 2,1 projecting from the forward end thereof to receive an expansible split sleeve or bushing 28.]1The yfrust'o-conical 'portion 21 is bored and tapped to provide `an internal screw-thread for the reception of a screw 29.l The rear end of the bushingl28 is provided V.with a'peripheral ange 30. against whichthe parts tol be mounted may abut land by which the"bushing may be, shifted vtoward thelarger end of the4v frus'to-conical prtion tor bev expanded thereby. f A Ther grooving `device comprises? two thin scor- Iing disks '3l,'3i4, anI intermediate router 32 ybyy which the scoring c'lisksfare .spaced apart, and

. two relatively/thick circular `clamping Adisks 33 and 3A. 32'

l u .The scoring disks 3l land vthel router are arranged between the clamping disks 33 and '.34 and this assemblage ris mountedonfthe "split bushing 28. Acollar j35fi`s also mounted on the bushing and is located between thecl'ampingv` ldisk3d and the flange'3"` to furnishsuicient aggregate axial dimension ofthe partsto insure clamping pressure. When thescrew 2911s set up.` tightly it acts against the'clamping-plate 33,

the .clamping pressure being. transmitted to theV flange 39 rby the interposed parts, and the bush- 'ing `28'l being thereby shifted 1 far enough `toward 'thellargerlend of thefrusto-conical portion 21 ,to be expanded thereby. vrTheassembled parts are thusfclamped in rigid relation toeach other :and tok thev shaft so that they will al1 becarriedvin rotational unity( 'l ,l v. Y

v Preferably,A the scoring disks 31|v are not much thicker than common paper, although in Fig. 1 their thickness is exaggerated. Because of their thinness they are flexible butthey are Aadequately reinforced by the clamping; disks and` the'A inter,- yposed yrouter 32' which rvcooperate tov brace them ragainst ilex're'adjacent'to their perimeters. As

illustrated in Fig. 2, each scoring disk is provided y'with a circular series of many fine `scoring teeth n 36 thatare y ratchet-shaped and pitched back-r wardly with regard to the direction .of rotation,l fsearrgws inr'igs. 1,' and zito the endthat their, inclined .edges will do Ithe scoring while j tneira'b'rupt edges'wiu `have no effect whatever. Consequently, in operationfthe lscoring teeth will press the upper materials of `a lasted shoe against the `insole, andwill have no tendency to vlift such vmaterials away from the insolvjor toltear them.

The` scoring A'disks' 3l Aproject radially' beyond the peripheries of the'r clamping disks 33and"34 `'a distanc'e'less than the` thickness v'of the work "tof bejgrooved, which'distancefshouldbe` equal to the aggregate thickness of thejl'a'fe'rsV of which ,construction in suchr shafts is a frusto-conical u insole'ever so islig'htlyr. Moreover, since the i thei'upper .material isv made, to thev endthat all theserilayersf may be scored quite to rthe outer surfac'eof theinsole, but in practice the factors thatsdetermine the aggregate thickness. of the upper-.Lmaterialrmay vary withinsmall limits so thatit is notaiways possible to score .entirely through .theupper `materials without scoring the i lorthe scored margins' of the upper material and sincelthey. have lconsideralzyle width they act in the capacity of depth-gages to' limit the depth to which the scoring disks .may penetrate. x Clamp- 'in-'gJ disks of A'graduated diameters may be used alternatively according Ato the judgment of the 'operator or the thickness ofthe materials to ,berscored i However, no seriousdamage will be donejto' a shoe if .the insole isf scoredV slightly ats-indicated atuthe points -B'Iin Fig. 6,'although thisrepresentationof scoring cuts inthe insole mayjbe slightly` exaggerated.

'The router 32 `is illustrated in Fig. 2 as providedewith'a small number of coarse teeth 3B,

spaced? farY apart, thatfproject slightly beyond theperipheries of the disksv 33 and 34 to rout the vsurplus material that lies between the scoringvteeth *36,but thelatter project beyondthe rotational `Aboundary of the routing teeth. The front'faces'of therteeth 38, considering their direction :of rotation, are abrupt to insure the de- Moi'eover, the extremities of' theseteeth are provided ,with sharp edges 39,

Ione of which appears inxFig. l and anotherin Figx.. VThese edgesare preferably concave to` afford relief in the middle zone ofthe space between' the scoring disks 3l, but the high points of the teeth 38 project nearly although not quite 1 to the rotational boundaries of the' scoring v teeth 36.

' groove as represented at 40 in Fig. 6.

When the described grooving device is used to cut' a groove in a cement-lasted shoe having surplus cement 20 (Fig. 5) between the lasted margins of upper material, the high points of the routing teeth 38 vwill rout 4the surplus cement adjacent to the scoring teeth 36 but may leave a residue of cement in the middle zone of the Such residue will not have objectionable eect if a shank-stiffener rof the type illustrated is to be used, since it will merely occupy the cavity or channel between the edges of the shank-stiffener without preventing'thosev edges from lying 1n contact with the insole.

" The type of shoehereinbefore described is the most diicult one in which to form a groove for the reception `of a shank-stiiener because of the fact thatrthe materials to be routedl are stuck to the insole with tough and. powerful cement, but

to be encountered are not so difficult. For example, Aanother well-known type of shoe is lasted in the shank and in the forepart with fine wire staples but without any cement, the lasting staples being driven into and clenched in the insole and 'constituting the only y connection between the upper material and the insole.v In other respects a staple-lasted shoe is similar to the shoe herein illustrated except that the reinforcing member i4 of compressed ber commonlyextends all the way from thev heel-endl to the. ball-line. Such' a shoelmay be grooved for the reception of a shank-stiffener by the grooving device herein i1- lustrated with comparatively little burden on the 'routing' teeth 38, since the surplus material to be routed is ,notstuck to the reinforcing piece I4 and may therefore be more readily routed and removed Vfrom the scored groove. In fact, no

" routing may be necessary in a shoe of that type these boundaries the routing teethv 38 will .pull

them out or cut themoi incidentally to vrouting the surplus upper materials severed by the scor-` ing teeth 36.

, To out a groove in ailasted shoe the operator holds the shoe bottom up in both hands with the heel-end toward him. Then, facing the grooving device according to Fig. l he presents the heel-seat portion of the shoeto the bottom of the grooving device andgdrawsthe shoe toward him until thegroove has progressed to the ball-line thereof. Since the scoring disks are flat and parallel, and since they remain in the scoring` cuts they guide the shoe in a straight path. Y

Having thus described the invention,.what `I claim as new and desire to secure by Letters Patent of the United States is:

l. A grooving devicecomprising a pair of thinedged scoring members spaced apart to score respectively the opposite margins of upper materialV that lie on the shank of the insole of a `lasted shoe,V a router arranged between said scoringv m members to route the surplus upper material that lies between them, and rotary driven means by which said scoring members and said, router are clamped and carried in rotational unity, an ele-y ment of said meansbeing `formed and arranged to limit'the penetration of said scoringmembers beyond which they project a distance less than the thickness of the work, said spacer having one or more teeth provided with sharp edges arranged to rout the stockl between the cuts made by said scoring members.

3. A grooving device comprising two thinedged scoring members, a router arranged between them,.rotary driven means by which said members and said router are carried in rotational unity, and two cooperative depth-gages between Vwhichl said scoring members are arranged, said scoring members projecting beyond the depthgages a4 distance less than the thickness ofthe work to be grooved.

4. A grooving device comprising two circular confronting depth gages spaced apart, two thinedged scoring members arranged between them, a router arranged between said scoring members, and rotary driven means by which the aforesaid elements are carried in rotational unity, said router projecting` beyond the perimeters of said gages a distance less than the thickness of the work to be grooved.

5. A grooving device comprising two thin-edged scoring members and an interposed router all y arranged to rotate about a common axis, and rotary driven means by which said members and said l' router are carried, said l scoring-g members 'having b ackWardlyIA pitched teeth .that .project beyondsfthef rotational bmm'daryA of i said :router to' yscore'athe-Wo'rk IWithout tearing' thejsubstance thereof..` :L r-N ,A r

l 1 f6. 'A g'roovingdevice comprising'two-fthirriexifA ble sco'rin'g-t disksgan interposediroute'r, tWofrelaf tively: thick clamping 'disks'ibetweenfwlriich' said scoring disks' and-said'` router-fare arranged, and

rotarydriven; meanszby-:Whichtheaforesaid fele-rments arefclamped and 5 carriednin rotationalv unityfsaid router and saidiclamping' disks being formed to brace s'aidiscoring disks" gainstglexure adjacent to' their perirneters; f l' 7; 'Aw-groovingfde'yioecomprisingitwothink-edged e scoring 'disk'sil:each: having.; ai circular l'series `of vperipheral teeth-said disks being arranged; 150,'

so orer:frespe'ci',iv ly` thefopposite margins of upper material 'secured to and yconfrontingy 'the shank of*` the ,insole-ofv a lasted shoe;1 a: spacer arranged betweenv said '-'disks, vturd circulary clamping rdisks between AWhich 4said scoringy disks! are arranged,

said scoring disks projecting l' beyond said clampingl disks ra distance sfubstantially(equal to 'the A*tlfickriess of such*` margins; androtary l driven means byfwhich 'said y'clamping-E disks, said scoringv disks andfsaid spacer are' clamped' Aandcarried y l infrotationalfunity, saidgclampingdisks being'ar-- rangedto run Son thescoedz-margi'ns of upper material adjacent tothesc'c'iring'cutsy and therebyv limit lthe `de'pihofl Saidcutsftd the thickness" 0f 'said' margins. 1.11-1'* f f 8". A grooving device' comprisinga4 rotary 'car-'- `rier, `a pairfoffthinledged scoring disks, a spacer arranged between said 'disksg-'a pair of clamping y disks b'etwe'e'nfwhich .said scoring l disksV` aref arrangedland means 'by 'which saidicla'mping disks l and'saidl spacermayfbel'cau'sed *toi clamp` said scoring disks and secure'thefparts to forni arota- 1:10.; A" grooving machinepomprising' a f yrotary thin-edged scoring sdisksgspaced{apartin confronting. relation f ands. proyidedif with tbackf Wardly; pitched'scori-ng teethysarid driven Irleansy ,in theA surface heldtagain'stlsaidIneansw tiorjialluriit,l vsaid scoring 'disks hav-ingl backwardiy said spacer having depth-,gages,- said-scoring disks and'.said'spacingl means are; clarrugied one against another Yand se, cured-'to.establish-rotationalunity.1 pair'of arrangedzto rout "the stockbetween thejscoring cuts'madesbylsaidjeeth. 11. kA scoring fmachine; comprising g a rotary driver-1;.-shaft, a .plurality'io '.thinfedgedf-scoring nierribersv carried thereby/a d-sspaced. apart laxiallyv to vproduce individualscoringcuts', and means 'y arrangedtdbeaigronffthe suriaoejto lbescored s and thereby controlithedepth -of Ythescoringguts.

driven shaft', means mountedthereongtohbear on the' surface vto be scored: and'therebyy ,maintainl a manually supportedworkpie'ceat a certain' disytance from the axis of said'shafaand al plurality of scoring members" carriedby Lsaid zshait -,and` f arranged yIto. form" laterally spaced,sk'soririg-A cuts 3213.1A groovirig machinel comprising as rotary driven"shaftia"plura1ity bf scoring 'disks'carried thereby and spaced apart to form; individual scoring cuts in a surfacev o almanually supportedv Workpiece, 4means mounted onj'said shafty tofbear on saidf"suriace and 'fthereby control-'zfthe depth of thelscoring-f cuts? and poweroperated 'means arranged' to' 'routthe ks tockbetween. said scoring 

